A/C vents not working

Hello,

The only A/C vents that work on the car are the legs and front defogger and the mode selector switch does not appear to change the mode. The mode selector switch blinks for about 30 seconds when I start the car and then stops blinking and the A/C comes on. I have both hot and cold air. My car has single manual climate control. I tore up the driver's side but could not see the servo motor on the driver's side.
Sir, my questions are:
where will I find the door actuator for the mode selector in my Toyota Camry LE, 2007 model?
How to proceed with fixing it?
I really appreciate your help, time and effort.